Conkers are round brown nuts which come from horse chestnut trees.
N-UNCOUNT
康克戏(一种儿童游戏，双方用系在细绳上的七叶树果猛击对方的七叶树果，击破对方者获胜）
Conkers is a children's game in which you tie a conker to a piece of string and try to break your opponent's conker by hitting it as hard as you can with your own.